package gdut.edu.config;

import gdut.edu.filter.JwtAuthenticationTokenFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    @Autowired
    private AccessDeniedHandler accessDeniedHandler;

    @Autowired
    private AuthenticationEntryPoint authenticationEntryPoint;
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                //关闭csrf
                .csrf().disable()
                //不通过Session获取SecurityContext
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                // 对于登录接口 允许匿名访问，注意：只有在没有登录的情况下可以访问，已登录了则不可以访问
                .antMatchers("/user/login").anonymous()
//                .antMatchers("/hello").permitAll()//允许用户登录或不登录都可以访问
                .antMatchers("/hello").hasAuthority("test")//用户需要有test权限才可以访问
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated();
//        把token校验过滤器添加到过滤器链当中
        http
                .addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
//        配置异常处理器
        http
                .exceptionHandling()
                .accessDeniedHandler(accessDeniedHandler)
                .authenticationEntryPoint(authenticationEntryPoint);
//        允许跨域
        http.cors();

    }

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
}
